/**
 *  Copyright (c) 2013, Facebook, Inc.
 *  All rights reserved.
 *
 *  This source code is licensed under the BSD-style license found in the
 *  LICENSE file in the root directory of this source tree. An additional grant
 *  of patent rights can be found in the PATENTS file in the same directory.
 */

package com.facebook.rebound;

public class SteppingLooper extends SpringLooper {

    private boolean mStarted;
    private long mLastTime;

    @Override
    public void start() {
        mStarted = true;
        mLastTime = 0;
    }

    public boolean step(long interval) {
        if (mSpringSystem == null || !mStarted) {
            return false;
        }
        long currentTime = mLastTime + interval;
        mSpringSystem.loop(currentTime);
        mLastTime = currentTime;
        return mSpringSystem.getIsIdle();
    }

    @Override
    public void stop() {
        mStarted = false;
    }
}
